Gasoline fuel composition for improved performance in fuel injected engines

Abstract

A method for improving performance of fuel injectors, and a method for cleaning fuel injectors for an internal combustion engine. The methods include operating the engine on a fuel composition comprising a major amount of fuel and from about 1 to about 200 ppm by weight based on a total weight of the fuel of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group and (ii) a halogen substituted C2-C8 carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially devoid of free anion species.

What is claimed is: 
     
       1. A method of improving the injector performance of a fuel injected gasoline engine comprising operating the engine on a fuel composition comprising a major amount of fuel and from about 1 to about 200 ppm by weight based on a total weight of the fuel of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group and (ii) a halogen substituted C 2 -C 8  carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially devoid of free anion species. 
     
     
       2. The method of  claim 1 , wherein the engine comprises a direct injected gasoline (DIG) engine. 
     
     
       3. The method of  claim 1 , wherein the engine comprises a port fuel injected (PFI) engine having an average fuel flow loss of less than 20 percent in a port fuel injection test. 
     
     
       4. The method of  claim 1 , wherein the halogen substituted carboxylic acid or salt thereof comprises an alkali metal chloroacetate. 
     
     
       5. The method of  claim 1 , wherein the hydrocarbyl group of the hydrocarbyl substituted compound is selected from the group consisting of linear, branched, substituted, cyclic, saturated, unsaturated compounds and compounds containing one or more hetero atoms. 
     
     
       6. The method of  claim 1 , wherein the hydrocarbyl groups of the hydrocarbyl substituted compound (i) are selected from alkyl, alkenyl, and alkanol groups. 
     
     
       7. The method of  claim 1 , wherein the hydrocarbyl substituted compound (i) comprises a hydrocarbyl-substituted, carbonyl-containing compound selected from the group consisting of acylated polyamines, fatty amide tertiary amines, fatty acid substituted tertiary amines, and fatty ester tertiary amines. 
     
     
       8. The method of  claim 7 , wherein the amines comprises C 10 -C 30 -alkyl or alkenyl-substituted amidopropyldimethylamines. 
     
     
       9. The method of  claim 7 , wherein the amines are selected from the group consisting of polyalkenyl succinic carbonyl amine, oleylamidopropyl dimethylamine, and cocoamidopropyl dimethylamine. 
     
     
       10. The method of  claim 1 , wherein the amine comprises a dimethyl-C 8 -C 24  fatty amine. 
     
     
       11. The method of  claim 1 , wherein from about 0.1 to about 1.0 moles of (i) are reacted with from about 1.0 to about 0.1 moles of (ii). 
     
     
       12. The method of  claim 1 , wherein the amount of additive in the fuel ranges from about 10 to about 150 ppm by weight based on a total weight of the fuel. 
     
     
       13. The method of  claim 1 , wherein the amount of additive in the fuel ranges from about 30 to about 100 ppm by weight based on a total weight of the fuel. 
     
     
       14. The method of  claim 1 , wherein said improved engine performance comprises providing an average fuel flow loss of less than 10 percent in a port fuel injection test. 
     
     
       15. A method of operating a fuel injected gasoline engine comprising combusting in the engine a fuel composition comprising a major amount of fuel and from about 1 to about 200 ppm by weight based on a total weight of the fuel of a reaction product of (i) a hydrocarbyl substituted compound containing at least one tertiary amino group and (ii) a halogen substituted C 2 -C 8  carboxylic acid, ester, amide, or salt thereof, wherein the reaction product as made is substantially devoid of free anion species. 
     
     
       16. The method of  claim 15 , wherein the hydrocarbyl substituted compound is selected from the group consisting of C 10 -C 30 -alkyl or alkenyl-substituted amidopropyldimethylamines, and C 12 -C 200 -alkyl or alkenyl-substituted succinic-carbonyldimethylamines. 
     
     
       17. The method of  claim 15 , wherein the hydrocarbyl group of the hydrocarbyl substituted compound is selected from the group consisting of linear, branched, substituted, cyclic, saturated, unsaturated compounds and compounds containing one or more hetero atoms. 
     
     
       18. The method of  claim 15 , wherein the halogen substituted acetic acid or salt thereof comprises alkali metal chloroacetate. 
     
     
       19. The method of  claim 15 , wherein the engine comprises a direct injected gasoline (DIG) engine. 
     
     
       20. The method of  claim 15 , wherein the engine comprises a port fuel injected (PFI) engine.